Tourasia Roemer – the largest tour operator in Switzerland specializing in travel to Asia – and Zurich-based Diethelm Travel Holding are merging their Asian destination management operations. The deal creates one of the largest destination management companies in Southeast Asia, with more than 500 staff in 13 countries and a combined annual turnover of USD 90 million. From mid-September Stephan Roemer, founder and Managing Director of Tourasia, takes over the post of CEO with responsibility for all operational activities headquartered in Bangkok.